CVE-2026-45243: Steipete Summarize

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Summarize prior to 0.15.1 contains a missing authorization vulnerability in the content script window.postMessage bridge that allows malicious pages to perform unauthorized operations on automation artifacts. Attackers can simulate runtime messages with spoofed sender identifiers to list, read, create, overwrite, or delete automation artifacts scoped to the affected tab without proper authorization checks.

Affected products

• Steipete Summarize: before 0.15.1 (fixed in 0.15.1)

Published 2026-05-18. Last modified 2026-10-08.